Claim of US Patent No. 10,143,091

1. A method for forming an oscillator arrangement that includes a resonant circuit, the method comprising:forming a first inductive element on an electrical substrate; and
forming a second inductive element on the electrical substrate spaced apart from the first inductive element, the second inductive element substantially opposing the first inductive element to provide an annular resonance structure, wherein the first and second inductive elements have substantially identical electrical characteristics, the first and second inductive elements curve towards one another so that the annular resonance structure encompasses a voided interior region, a first longitudinal end of the first inductive element faces a first longitudinal end of the second inductive element across a first air gap, and a second longitudinal end of the first inductive element faces a second longitudinal end of the second inductive element across a second air gap.